Satoshi for bitcoin are hard to get for free now! A lot of work and small rewards.
You can switch to ethereum tokens!
Use those 2 rules
1- when they ask donation, leave the airdrop
2- never send private keys
Sirius companies don't ask money for free coins!. They maybe ask keep money for airdrop for token holders but is a different thing!
A lot of airdrops are scams but the safer are here
https://bitcointalk.org/index.php?board=159.0 use CTRL+F and search airdrop over the pages, you can also look every ANN BOUNTY there to see if there is telegram airdop (remember if is boring to use phone you can use webtelegram), the most of them requires only the join of the channel, no rank, no social media followers or skill!
you can also look here for airdrops
https://bitcointalk.org/index.php?topic=2170068.5000 (French 3D, easy to navigate even if you don't speak it)
and
http://cryptocreed.com/airdrop/but watchout for scams and
rembember the rule 1 and 2